Adapted from a chart prepared by UC Davis viticulture specialists, faculty and cooperative extension farm advisors.
Legend for Vitis Parentage: a - Riparia b - Rupestris c - Berlandieri x riparia d - Berlandieri x rupestris e - Riparia x rupestris f - Riparia x (Condifolia x rupestris) g - Longii x riparia h - Champinii i - 1613 (solonis x Othello) x Dogridge j - Berlandieri x Columbard k - Vinifera x Rotundifolia l - 161-49 x 3309 m - Ramsey x Schwarzman n - Rupestris x Rotundifollia o - (Rufotomentosa x Dogridge x Riparia Glorie) x Riparia Glorie p - (Rufotomentosa x (Dogridge x Riparia Glorie) Champinii c9038)) q - (Ramsey x Riparia Glorie) x Champinii c9021
RATINGS: VL - Very Low L - Low M - Medium H -High VH - Very High T - Tolerant
The degree of long term phyloxera resistance is questionable due to the unknown Vitis vinifera parentage of these rootstocks.
